I editmany academic articles through an agency. I send my edited version to the agency and they send it to the customer. Occasionally I get one of the edited articles in a second round (the customer may have commented something, or added something, or require clarification). This means that I see what the agency delivered to the customer, and it's not seldom that they have toned down my comments.

Not that I'm abrasive as Calvo, but the agency does things like adding "I suggest that..." and "Have you considered...".